The , also rendered as Asai, was a

Japanese clan This is a list of Japanese clans. The old clans ('' Gōzoku'') mentioned in the Nihon Shoki and Kojiki lost their political power before the Heian Period, during which new aristocracies and families, ''Kuge'', emerged in their place. After the He ...

during the

Sengoku period The was a period in History of Japan, Japanese history of near-constant civil war and social upheaval from 1467 to 1615. The Sengoku period was initiated by the Ōnin War in 1467 which collapsed the Feudalism, feudal system of Japan under the ...

History

The Azai was a line of ''

daimyō were powerful Japanese magnates, feudal lords who, from the 10th century to the early Meiji era, Meiji period in the middle 19th century, ruled most of Japan from their vast, hereditary land holdings. They were subordinate to the shogun and n ...

s'' (feudal lords) seated at

Odani Castle 280px, Map of Odani Castle was a Sengoku period mountain-top Japanese castle located in the former town of Kohoku, now part of Nagahama city, in Shiga Prefecture, Japan. Only the ruins remain today. It was the home castle of the Azai clan and t ...

in northeastern

Ōmi Province was a province of Japan, which today comprises Shiga Prefecture. It was one of the provinces that made up the Tōsandō circuit. Its nickname is . Under the ''Engishiki'' classification system, Ōmi was ranked as one of the 13 "great countrie ...

, located within present day Nagahama,

Shiga Prefecture is a prefecture of Japan located in the Kansai region of Honshu. Shiga Prefecture has a population of 1,412,916 (1 October 2015) and has a geographic area of . Shiga Prefecture borders Fukui Prefecture to the north, Gifu Prefecture to the nort ...

. The Azai originated in the early 1500s and claimed descent from the Hokke branch of the

Fujiwara Fujiwara (, written: 藤原 lit. "''Wisteria'' field") is a Japanese surname. (In English conversation it is likely to be rendered as .) Notable people with the surname include: ; Families * The Fujiwara clan and its members ** Fujiwara no Kamatari ...

, a powerful clan in Japan from the

Heian period The is the last division of classical Japanese history, running from 794 to 1185. It followed the Nara period, beginning when the 50th emperor, Emperor Kanmu, moved the capital of Japan to Heian-kyō (modern Kyoto). means "peace" in Japanese. ...

to the

Kamakura period The is a period of Japanese history that marks the governance by the Kamakura shogunate, officially established in 1192 in Kamakura by the first ''shōgun'' Minamoto no Yoritomo after the conclusion of the Genpei War, which saw the struggle bet ...

. Initially, the clan were

vassal A vassal or liege subject is a person regarded as having a mutual obligation to a lord or monarch, in the context of the feudal system in medieval Europe. While the subordinate party is called a vassal, the dominant party is called a suzerain. W ...

s of the Kyōgoku, but gradually emerged as independent ''daimyōs'' in northern Ōmi. However, Azai domains were soon conquered by the

Rokkaku Rokkaku ( ja, 六角, "six corners" or "hexagon") can refer to several things: * Rokkaku Chuu (市立六角中学校), a fictional school that appears on ''The Prince of Tennis'' *Rokkaku clan, a clan of samurai * ''Rokkaku dako'', a type of six-co ...

and the clan was forced into becoming their vassals.

Azai Nagamasa was a Japanese ''daimyō'' of the Sengoku period known as the brother-in-law and enemy of Oda Nobunaga. Nagamasa was head of the Azai clan seated at Odani Castle in northern Ōmi Province and married Nobunaga's sister Oichi in 1564, fathering ...

became head of the clan in 1560 and successfully fought against the Rokkaku and

Saitō Tatsuoki was a daimyō in Mino Province during the Sengoku period and the third generation lord of the Saitō clan. He was a son of Saitō Yoshitatsu. His mother was daughter of Azai Hisamasa and nephew of Azai Nagamasa, a grandson of Saitō Dōsan. He ...

for independence by 1564. The Azai were long-time allies with the Asakura clan of

Echizen Province was a province of Japan in the area that is today the northern portion of Fukui Prefecture in the Hokuriku region of Japan. Echizen bordered on Kaga, Wakasa, Hida, and Ōmi Provinces. It was part of Hokurikudō Circuit. Its abbreviated for ...

who had assisted the clan in securing their independence. In 1570, Nagamasa joined the Asakura in their opposition to

Oda Nobunaga was a Japanese ''daimyō'' and one of the leading figures of the Sengoku period. He is regarded as the first "Great Unifier" of Japan. Nobunaga was head of the very powerful Oda clan, and launched a war against other ''daimyō'' to unify ...

, his brother-in-law and ally, to honour their alliance. The Azai were defeated by Nobunaga at the

Battle of Anegawa The Sengoku period (30 July 1570) occurred near Lake Biwa in Ōmi Province, Japan, between the allied forces of Oda Nobunaga and Tokugawa Ieyasu, against the combined forces of the Azai and Asakura clans._It_is_notable_as_the_first_battle ...

in 1570, and all but eliminated when Nobunaga conquered Odani Castle and Nagamasa committed '' seppuku'' in 1573.

Order of succession

Azai Sukemasa was the head of the Azai clan. Sukemasa was a retainer of the Kyōgoku clan but when the Kyōgoku clan declined for conflicts over the succession, the Azai clan came to power with Sukemasa as its daimyō. After Sukemasa died, his son Azai Hisa ...

– son of Azai Naotane, established Odani Castle in 1516 *

Azai Hisamasa was a son of Azai Sukemasa and the second head of the Azai clan. Hisamasa became the head of the clan in 1542 after his father died, but unlike his father, he was never a strong leader. Losing domains against Rokkaku clan,_he_instead_became_a_R ...

– son of Sukemasa, was defeated by the

Sasaki clan are a historical Japanese clan. Overview After World War II the clans of Sasaki-rokkaku were combined, the clans were spread out between South Eastern Asian islands and the head of the clan left Japan and eventually moved to the United State ...

– son of Hisamasa, came into conflict with Oda Nobunaga and opposed him, entering an alliance with the Asakura clan and the

monks A monk (, from el, μοναχός, ''monachos'', "single, solitary" via Latin ) is a person who practices religious asceticism by monastic living, either alone or with any number of other monks. A monk may be a person who decides to dedicat ...

Mt. Hiei is a mountain to the northeast of Kyoto, lying on the border between the Kyoto and Shiga Prefectures, Japan. The temple of Enryaku-ji, the first outpost of the Japanese Tendai (Chin. Tiantai) sect of Buddhism, was founded atop Mount Hiei by ...

; he was defeated and forced to suicide by Nobunaga in 1573. He was married to Nobunaga's sister

Oichi was a female historical figure in the late Sengoku period. She is known primarily as the mother of three daughters who became prominent figures in their own right – Yodo-dono, Ohatsu Nagamasa had no hope of winning, and chose to commit sepp ...

. His daughters included

Yodo-dono or (1569 – June 4, 1615) was a prominently placed figure in the late- Sengoku period. She was the daughter of Oichi and sister of Ohatsu and Oeyo. She was a concubine and second wife of Toyotomi Hideyoshi, who was then the most powerful ...

(second wife of

Toyotomi Hideyoshi , otherwise known as and , was a Japanese samurai and ''daimyō'' (feudal lord) of the late Sengoku period regarded as the second "Great Unifier" of Japan.Richard Holmes, The World Atlas of Warfare: Military Innovations that Changed the Cour ...

and mother of

Toyotomi Hideyori was the son and designated successor of Toyotomi Hideyoshi, the general who first united all of Japan. His mother, Yodo-dono, was the niece of Oda Nobunaga. Early life Born in 1593, he was Hideyoshi's second son. The birth of Hideyori cr ...

). Also

Oeyo , , or : 1573 – September 15, 1626) was a prominently-placed female figure in the Azuchi–Momoyama period and early Edo period. She was daughter of Oichi and the sister of Yodo-dono and Ohatsu. When she rose to higher political status during ...

(wife of

Tokugawa Hidetada was the second ''shōgun'' of the Tokugawa dynasty, who ruled from 1605 until his abdication in 1623. He was the third son of Tokugawa Ieyasu, the first ''shōgun'' of the Tokugawa shogunate. Early life (1579–1593) Tokugawa Hidetada was bo ...

and mother of the third Tokugawa shōgun

Iemitsu Tokugawa Iemitsu (徳川家光, August 12, 1604 – June 8, 1651) was the third ''shōgun'' of the Tokugawa dynasty. He was the eldest son of Tokugawa Hidetada with Oeyo, and the grandson of Tokugawa Ieyasu. Lady Kasuga was his wet nurse, who a ...

) "The silk coloured portrait of wife of Takatsugu Kyogoku,"
Digital Cultural Properties of Wakasa Obama

Gifu prefecture website.

Prominent vassals

Akao Kiyotsuna or Akao Mimisaka no Kami Kiyotsuna was a Japanese samurai of the late Sengoku period, a senior retainer of the Azai clan of Ōmi Province was a province of Japan, which today comprises Shiga Prefecture. It was one of the provinces that m ...

* Isono Kazumasa *

Kaihō Tsunachika was a Japanese samurai and commander of the Sengoku period who served Azai clan as a senior retainer. His son Kaihō Yūshō was a representative painter of the Azuchi–Momoyama period in Japan. Tsunachika served as a senior retainer and mili ...

* Amenomori Kiyosada *

Tōdō Takatora was a Japanese ''daimyō'' of Tōdō clan from the Azuchi–Momoyama to Edo periods. He rose from relatively humble origins as an ashigaru (a light foot soldier) to become a ''daimyō''. Biography During his lifetime he changed his feudal ...

History

Order of succession

Prominent vassals

References

Further reading